Abstract:【Abstract】 Objective The purpose of this study was to evaluate the distribution of Schmorl'snodes (SN) in MRI images of the lumbar spine and analyze the correlation between SN with degeneration type of lumbar intervertebral discs. Methods 781 patients examined by lumbar MRI scan were included in the study. The patients’age, sex, location in different vertebra of the Schmorl's nodes, the MRI signals’type of Schmorl's nodes, the degeneration type of lumbar intervertebral discs and the MRI data were all recorded and contrast analyzed.Results 93 Schmorl's nodes patients(male:54,female:39)were detected in 781 participants (male:376,female:405). The incidence of Schmorl's nodes in male was 144% and female 96% (P<0.05). Most Schmorl's nodes located at the superior endplates of vertebra(33%) and the inferior endplates of vertebra (24%)(P<0.05). 93 patients had 465 intervertebral disc segments. 255 segments of 465 disc segments were involved with lumbar intervertebral discs degeneration. The incidence of lumbar Schmorl's nodes in disc degeneration was 478%. The incidence of normal signal’s SN in disc degeneration was lower than the other two (P<0.05). 127 segments of 465 disc segments were involved with disc bulging. The incidence of lumbar Schmorl's nodes in disc bulging was 48% (P<0.05). The incidence of disc bulging was no significant differences between groups with both sides Schmorl’s nodes and one side Schmorl’s nodes. Disc herniation, disc prolapsed and HIZ seemed not to be correlated to the incidence of lumbar Schmorl's nodes (P>0.05). Modic changes were 64. The incidence of lumbar Schmorl's nodes in Modic changes was 734% (P<0.05). Conclusion The Schmorl's nodes had a obvious relationship with disc degeneration and disc bulging. Schmorl's nodes are highly associated with Modic changes. The incidence of lumbar intervertebral disc degeneration is different in different types of SN’s MRI signals.